I shoot a Cobra Boomslang LT. It is a three pin with a light. It is a decent sight and only around $70. Might want to consider what size diameter fiber optic you want. I think my fiber optic is a bit large at .029".
sword Twilight hunter is a nice sight. I upgraded this year to a spot hogg and I have to say that it's the best sight I've every owned. I have a five pin and think I pd about 150 for it, but there are a lot of models and maybe a 3 pin would be around the 100 range.
Check out Extreme sights, they are pretty nice...the bone collector series are toolless, so you don't need allen wrenches for windage and elevation adjustments which is kinda handy. I have .029" fibers in mine and they are a little big, especially when it's bright out, the pins really seem to get a halo around them...next one I buy will have the .019" fibers.
I'm going to a HHA single pin this year for my new bow, but I have a Toxonics 3 pin on my old one. I liked this sight, it did me well. If I were going to get a multi-pin sight, I would deff. buy another.